First I tried to control my video library by having everything ordered by topics/series (Actuality, Nature, Holidays, etc.). But the more I collected those kind of videos for my class (Primary school), the more I have videos that fits in two or more topics. And there is my problem, because I have everything located by there topic (so I could find them earlier to put them in Powerpoint), the more I had to narrow it to much down to just one topic. That is why I try to have them orded by orther categories, like Producer, Series, and so on.

And there is my question, because not every video fits in all of those category, is there a way to use the category, only if it is known? I mean, MW 4.1.19 now use the tag 'Unknown', instead of keep it blanc. For example with <Producer> - <Serie> - <Titel>: Blender Foundation - Big Buck Bunny, in stead of Blender Foundation - Unkown - Big Buck Bunny. Oke, this example isnt made for a serie, but I have a lot of video that are.